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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5a228992a3cd38f4d0a64b660439aff6399d5d4a15a7c30e6f9056548b946cd' 
  AND token = 'kFuU0Wy0Ux4N0meSqRt/81+1S8lC/7NjN22Q2jo+oyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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