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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32914a875061470c6b80badd7a1d0bd35f62cee30c41c577ccb9f4ce2f5ad70a' 
  AND token = 'lct8NLcfQCjZ09msVJLPuEPUg0K38PGPVFKTcNWFFDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}