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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f5d810780235f0e842a1a0b917f85e33fcbfb8e6059d45eb1271079e2b72560' 
  AND token = 'ktHnw1uorNXDGlgk0U7xoWm+FAY+SGPUA0vaubcPYgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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