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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f084d60ae2bf16015e4955cf2a1d8b6d20b50c74eec4e677cfa798c2c8f4ada9' 
  AND token = 'zICTMCHkPpTXbftSh8yxX8tjn5KmR/EruXp9m/1AbcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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