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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dfe966e5166e74da89bb716b8ebe834ccdb0cce28229a5cd501eb549b1d9a4ce' 
  AND token = 'lHSdwNJsm3GLpBNWpNtIIGZi8SXu5w8tHX7ztHi4LnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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