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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbe2705e94c130cbf870bfefb7d8f516c309fbafc9c7825353b8ded211793ba' 
  AND token = 'G30uFUSKa/oDZLV1cBk5syeM/sKBRb6zd/rVQn7f+Ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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