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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd043be0ca46ecd868f70ed88019492c4fbebf1e81a526578b1cfa1a3a9df7ff4' 
  AND token = 'EDQD0+Z2kB1521cAIjz4/I2uA63Tni1Dd8XyQjze8Io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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