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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9788e6381fd774316ce934d042adf1c725ff07eb5d2506a420a48cbb0c37c658' 
  AND token = 'AO5HV9pqMVbu9q4j4i3d6SBlcR6wMTWPAeqNKmYKk6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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