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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd8e345eadb11395e7c157c1ef5c47efe6f074fdd8f937095a800d3ef92ab05' 
  AND token = 'oweuEDg4PhO6rkGK8B8Ku5KfnNOD1lMFs5zfIRHexlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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