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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a084de0f5e3ee48dfaf13d30503e29d3c14943fdca3837ef46a01395f6fc7ec1' 
  AND token = 'bjrzpf5YVK7zbcZZH1Cn0MPRb7ZgYpbR+X2jeW9SvKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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