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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0afd2e7bff3aef0551bd7638b91aaf25053578014b3d3d292393d7d0cd2aea4' 
  AND token = '/g+aaLfuWyXE2vtNpNBsZ00m2vadieR3wowNDJ5GVAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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