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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e01fd3455ac7e34dfbf28005ac89844b3561db8d021b33efa4d27b57fe7d79b0' 
  AND token = 'ek8LOotITLeUselskFamzsW5CKWUR+QvD4NhiG3rqhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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