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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cba60ee92b5eaaf932603159cb61d56eba475ba0af4c31c39c1384e23a6c380' 
  AND token = 'ofRPWyv4EwGcdrvVal/mRi/F7dSAufXpkFo3dp5wz6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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