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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '088aa03e0711ea4b60cfaedd263eb0d6206e7aefd21db2bffec95bfedbc8dc3b' 
  AND token = 'aI5v75O9rAQNgND4QyuHYO998jVilW2Fp+3S8TmdRLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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