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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '967bdfe06b894ab9e4ff3ca2563292b3b9cc9285d4b8c904ab5aec69cf4f77d1' 
  AND token = 'bIySjE964+J04n0kr2NEAdXV6ATZDXnfl/8K6BpQZNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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