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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dae6f7f09d4d9d4deddbdd4f34380548badee3e68fd48e604e78f5ab3561488' 
  AND token = '16uyDVJB4ECVg0VtzSJRKR8JGaH5bxdMS6FIG3Tdw9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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