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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0edf9a6c30e28e4935b2d5245dc59277baac05eacb6c882a21cac0b7184562f' 
  AND token = 'tjSm/is9vtoj8O511tItFuIDAHVR9+2PETLIWV07gxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00215

JSON explain

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