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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a58ecaa5ee19d6c74432f71cec2810c80c786f3e6b359468f0eace74c230b9a8' 
  AND token = 'XK/xRDu/aPVeYPmLNvCl/Ia6c+QVKf/sq9+iQqndNMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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