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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9701efdd6d3b4b264cc8cf66dac17846e1502cda79d79c807b37d493e639afc' 
  AND token = 'zclIWIYVmwJhkL1HXouAE4dwhr7F3FX7eYFUViDEQ5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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