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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe7ee2704a051f22bebb3c5bdd1651f443ad98cbb1c7a1f402e7ee8d4ebaae13' 
  AND token = 'b07faluy/EYeIbH83NOlojiCYQpdbuTva7raNz+5bX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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