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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d4162ce319e6a6b5a345734c1a6e32925fcef1e831472336941b385a1a82822' 
  AND token = 'pYSca9p8vLa+9v7JcpzkmQ/u2Ax1dbQnWYDdZAI/VS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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