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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80e4e2062380f3f38628e9ed2556d23ce8d480a76ba7e5fa82e536ded53fed3d' 
  AND token = 'FkHZqhW9TebbOJvy1ydAwe43AhAZVR2EccJAra7XlDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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