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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '419f142f9ee9737563a78674febeba75e145cbe7e3702da6de429c27a0043809' 
  AND token = 'W250toz6FP5w9/BeOGGJfcrreViHR1nNvbRR2K0lSKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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