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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1091391ee05f894b5ec6602f6d13201e4f750d3329ff50faf17f441abd9d7fa4' 
  AND token = 'p3u0q46ci38JiBNq7pGl/XgFSNhb10caODVJRsFY+Wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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