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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46571eb32ef90e25350a42b8bb31a5bccfed495de927a864e0cf4e7dc24a2953' 
  AND token = 'bdI2G2kcPbjBhZ76SD74+GyTyNuZzrR8he6zAcEJcVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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