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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06061a45851fe28f8251dd849f31bc4d36e8ffe0cd3052c5a421914835cdec4e' 
  AND token = 'XgZAUW14P+Whs9NjDuA/aBbzh6NfVa5NPTQ6DWhTAGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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