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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bad4e4fb9a9e320ad826ac393d057d6aeb6d1dca8b62bcb990a1655faf42946' 
  AND token = 'AVLKNcB54Qa9ICw20ZWqAp5dgz4Go9b6Q7dGPF8HBks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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