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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b1e0ba36c4da858fba8b5d266351a23aa99e37769d46327010eb5c54bac7fe0' 
  AND token = 'iG7oO7vBytZLmnXH28pPgOWhX3f6fzhGyC6WwcbcFnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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