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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0efe7e5a26026b62272333c5ee402a9f38451d6f34e508e92ecc4eb6a5041c9f' 
  AND token = 'fb1yisgTU9GOLLvW1yQBbR6iJ6oInoabSR4mX80VVvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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