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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bee7aa7e821785b8f43e7bf156c863064b410717d7676263c1132f2ea9ebb32' 
  AND token = 'Zcmpn9QSMhsSlUsl2+lOmEonIgPmOGMySqQDYKlUcwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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