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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8847b60659800354e67e06c78c4f5a36a8872aca2dc4310d0d6b0f773867e33d' 
  AND token = 'FjGaH1y2xjJh2FmmMqFIdl8jOMY41+BAtxLHYrFav1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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