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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e2a94452fe23d9eb5e88a9533e63b10cfcde5bcef8da06da5b99505704d7fa7' 
  AND token = 'bXluh0mLsEU+RIxXuEzhYaqT7Ur77bxeTWYMj6NdKEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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