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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd3179a31cc6f40794e2444d73187d5f9c52c4564acd450e24a6b49557e253a5e' 
  AND token = '73dI1VC4A/Xgvku1iPJPcp/8YX8JJU4J4TUnO08UiTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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