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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80d4520e984f7e06c167457900d4a2a275d3c3e0fcf1d70f5a4e38e35007436e' 
  AND token = 'VmVCTGAVspcy1Fxi1YeQdoXekl1sDA3EHxy6gM4FMSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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