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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '804dd33a89df8ecd703229f95def015e4ff2e32b9362afba1cae9d7653396a02' 
  AND token = 'iOnFyA3i9e6JLBUX9PSlPZpjeP5bfsw224q7dOuQOJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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