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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11a09e2b0ccf10d7c597608e22ea0a0f8c1130a95b0132bb56d4c70f98df340b' 
  AND token = '+wfY6C03s4d5QhI1EukpOwbdC1z3TNNqJVrvvlD5Rq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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