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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f6649edf3af46a9ba86f53237ccdce7c67f5667574a0ccfab058f95e56acc7c' 
  AND token = 'e/Bi1v72dQwHpUlsqyIeac+n76M25ldlt5yK4t8NZeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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