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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e996497aa89ab75a37ad375171e19fa7fc5e181edc654967077fffa47514b2ce' 
  AND token = 'XjEV8uF+6+8sE+TC7XPCDHFq3vP5XUz7145ZeBtR2SI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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