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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e498b1ad3edc95d28bf7fe86169b0ae5f5b2cbd1afe5db6c8fd6a0cd3f8d5f01' 
  AND token = '7Zsxnl/p5szH/P2bbiFu1+j9tHwAnDHwpGoPeh7WKTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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