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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1ac79586fba50662316c51e80ebf6cddb5162e6704e05e3fe0a6e98b6becc73' 
  AND token = 'ghqZ8g66tv6sccFH/1LhYmPrtZi5VGLBfKpcichceGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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