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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14358abd4e7183a913f9acacd13d0135ef46951b9e661f481118387dc882e468' 
  AND token = 'WEYMAHLexxyNc95DqXiMlEGovlr4OFSPemANBy9Q8/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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