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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f571d674aa49166ec7ac1763672cb91d3a58d43e1cfb8f5f8b517386115bfda7' 
  AND token = 'e2vxMjtrYNgazuCePUmWvLA3dDs5zzqC2Q9yu2vTI/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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