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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092232af2a11b556b1b79196ce9b9604f8387b6c69eb43a291562cc895f35cb6' 
  AND token = 'A85uDgni6BSz3VwPHSDG/t3mCBt8fL9xcAITJd6jzMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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