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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9faa91cd769ddce774f367bf2de33d2d3872a6e80bab49085e2eb916b4f1ff95' 
  AND token = 'RLI3eW+f3F/G+ncSGOI4w3P+0PYfasWIhdo4V49iH+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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