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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf24b6c68c9d2edd9e1b07430c62ef3205227dce05166651c6fc40b7dba047c7' 
  AND token = 'Vq2lPL97NR/5hjgJVnrzPvyt2nlmi8uInw2dIFkO014=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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