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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1afa47413f03ce08fe99b1f8faa2f9f766cd6397039cee17f113fde10b42f7' 
  AND token = 'E2Lr2OW0YaHHfSNYbPVyYiC/jU0AVoc7ourXzb19jM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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