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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '001ed2d756e504e048a8487e7b484fdfcb60d731ec1f5c783e2f447330a0fb64' 
  AND token = '2HOKkDkHrGi6MNfHtg0lffG+bcRX+6tLl0+wL6p4tVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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