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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58011b22f3958c83ab02db41f54c06ac8268d87a7bf2cde36a298f12e9f720ce' 
  AND token = 'DeciNBqcdiGGiQ90L/E6k0V9vnkp0/+nmYQwPRu0qtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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