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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f404eb598eeaa3c5f73b2e45ba72e0790fb1ab444972cb5d85c204beead516ef' 
  AND token = 'gRbS6+bP7usARk7Y6M29c7siuGdd0xnZCT4HOyBCkAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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