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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fdc0f5d3f6e282080fd75f57179c95622107474ee1b5891d5e51f3fcf19928de' 
  AND token = 'q5GGwqLCrQWFnxUczd/lxQ3HXMR2yOYRCk8V1uAeO7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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