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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ec3804922036d9efadbde39f32646427da945f6ff7f7f791cd017db82bb8ed' 
  AND token = 'cdhsi9fhrZP8QAuzP+p8G5mk7HJRFoMtQ9bluDd/PdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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