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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd0db7d3b37cea3755ac148ee46a6e57e1bc0a4ce4eaefae97125613a5452569' 
  AND token = '0T5ltNrXmqEjlkM8uFo2d3OEP6JZX3vapruOLJeIBLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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