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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '932204e1bf9590ba90138ee2af3bdcee63a8c6c2fea2a1af9ffe0bcaa58de1f0' 
  AND token = 'y3otwJAZUDfv2TpOqDE/dC26nNKR/khU0NVztD5JY1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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