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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f01d416865e758ac876e5375076cddcd2ce4125ec5e7ef388f71c715f57d975c' 
  AND token = 'QdEl6I89Wg8vgwYab2V29Jwdd1szPYWvmJ/V+v45kdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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