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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3c00de8891e21053fe80791ceaa416fd9110e1a3d18b80fd5e8f094f0465b5' 
  AND token = 'tG3OU8GQG59l7hSQkPQRHDU15xsl4zKq2oQJmRgiLE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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